Switch and fuse mechanism



Nov. 16 1926.

T. E. MURRAY, JR., ET A1.

SWITCH AND FUSE' MEGHANISM Filed sept. 9, lsaz 5 Sheets-Sinaai 1 Nov. 161926.

IT. E. MURRAY, JR., E1' m.

l SWITCH AND FUSE MECHANISM Filed Sept. 9, 1922 SShe'etS-Sheet 2,ATTORNEY Nov. 16 w26. 1,606,890

T. E. MURRAY, JR., ET AL,

SWITCH AND FUSE MECHANISM 9, 1922 5 sheets-sheet 5 Filed Sept.

Thomas E. MU

Nov. 16 1926. LGOBQO y T. E. MURRAY, JR ET AL SWITCH AND FUSE MECHANISMFiled Sepr.. 9, 1922 5 Sheets-Sheet 4 N1/moms Thomas E. Murray, Jn

Nov. 16 1926.

T. E. MURRAY, JR., ET AL SWITCH AND FUSE MECHANISM Filed Sept. 9'. 1922l 5 Sheets-Sheet GGG Patented Nov. 16, 1926i Unirse THOMAS'QE. MURRAY,JR., OF NEW YGRK; AND'LVILLIAM IC. BLCKWDOD, V(3F ELM- HURST, NEW YORK;SALD BLACKWOOD ASSIGNOR, BY MESNEASSIG'NMENTS, 'lO

SAID THOMAS E. MURRAY, JR.

SWTCH AND FUSE MECHANISM.

Application lcd September 9. 1922. Serial No, 5851,189.

The invention relates `to an electric switch with a fuse and casingtherefor and 1t is designed to permit introduction of a fuse from.

Fig. 1 is a side elevation oi a complete apparatus; p l m Fig. 2 is aplan'of the principal parts with the box open;

Fig. 3 is a perspective View of one of the fuses and adjacent partswitlrthe box in 1vertical section;

Fig. 4 is a lan and Fig. 5 is a perspective view of anot er embodimentof the invent'On; Y

Figfiis a vertical. section of a'third embodiment of the invention;

Fig. *."fisA a plan 'of' certain part-soi .Figo 5` Fig. 8 is a verticalsection (partly in eleve,- tion) ot another apparatus embodyingr theinvention gV Y* Y n l9 is a front elevation ot a paitot the same; y iFig. 1.0 isa horizontal section olf one 'of the inse carriers;

Fig. 11 is a group ot views showin the separate parts of a fusecarrier..

Referring-first to the apparatus of 1, 2 and 3, the easing is provi-dedwith, side walls' 1 and rear end wall 2 and a cover with an elevatedcentral portion i to form e pocket .tor the switch blades within the boxwhen the blades are turned upward. The hase oi the box is provided withan extension 5 at one end for mounting the meter.

The switch blades 6 are pivoted at one end on supportingr posts 7 andadapted to engage contacts 8 at their opposite ends or tobe swung up outof engagement with said contacts. They are connected to each other by aninsulated cross-bar 9 which carries a hook 10 for lifting them by hand'when the box is open.. The hook 10 has its rearend bent around auolil'set portion 11 of n shaft which is pivotcd ut its opposite ends asshown at 12 and 13 in the side Walls of the box; the end 13 carrying anarm or lever 14 by which the shaftV canbewturned so as to swing up theoilset.' portion "11" and with it the two switch blades. The switchoperatingA arm llt is limited in'its (mening and closing Inovement bymeans ol lugs 1:3 and 1G on the outside of the box. i Y Y.

The mechanismVv thus tar described. is a common arrangement 'foroperating Va switch from the outside ot the easing', so,y that thelatter can he locked and opened by' the electric lcompany only, whereasthe switch can be controlled by the user of the current.

li'e propose to apply to this and to any oth erusual or. suitablemechanism means for introducing a fuse or fuses, or for withdrawing` aburnt out fuse from the circuit and substituting a new one, also withoutacs Cess to the inside oi' the box or to the other parts of themechanism. lVe prefer in ad dition to'so arrange the parts as to`require the operator to disconnect the fuse socket or terminals fromthe circuit when a fuse is to be inserted or u new one sulistituted foran old one, so as 'to provide the .maximum ot safety against a shock tothe operator.

Thesefresults we 'may aceon'iplish by the .use/oi a multiplestusecarrier so designed and positioned r'that it. can` he manipulated fromthe outside otthe bongibrsevrhile the `other parts of the mccl'ianismare inacces sible, to remove u burnt 'fuse from the circuit.indisubstitute a new one` therefor. Various multiple fuse carriersnre'lrnowu and may be used with our invention. l

lWe have illustrated inrthis connection a common style of multiple fusecarrier o which the contacts are shown in Fig. 1 0

and the separate parte grouped together i'n- Fig. 11. The shell 1.7carries n contact ring 18 which screws into the; t'use socket of theapparatus and makes Contact with the side thereof, While the .end button19. makes contact with the center point at the bottoni ot the socket.A.Y plug` 20 tits into the shell` 17 and carries, set in verticalgrooves around it, a number of fuses 21 one ot which bears against :iterminal. 22 which Vlis connected with the ring 18. rlhe plug` 20 may beturned, the successive contacts 2l snapping into engagement with theterminal 22, the latter being pressed forward 'by a spring for thepurpose. The plug has a shoulder or head 23 which beers on the edge oi'the shell 17 and has an oblong projection 24 by which fue c( ve fusesinto operative posi'sbiou. plus" is fastened down by a ferrule whichhears on -op oiiihc plug and screws on o the outside of the contactcarrying shell 17.

In euch of the two circuits shown in Figs. 2 and 3 here is a socket 26carrying one of 1Lhese multiple fuse carriers with a thumb piece orhandle oi' suflieieifii height to project' through :in opening Qi iiiille cover of the box which surrounds lle seme closely.

'lfhe sicm or handle 2l carries at point lwithin lihc box a plaie wiihiuiiirer of notches 29 in its erige corresponding; in angular positionwith lhs several fuses carried thereby. The offs/cl. porion il of theshaf bv which the switch is operated carries projections 30 adapted tolit iu the recesses 29 and thus to prevent rotalion of elle plates 28and'of lche Vfuse carrier. This locking crigagcment occurs when theswilches are closed as in Fig. 3. lil/hen *the sivich is opened,however, the projections 3G are 'withdrawn upward from Jche notchedplates 'and the usewarriers can he ursed by means of their squareds'rems projecing' through or accessible *through openings in thecasing.' Thus we have a double saiety feature in that the operatorchanges a fuse With `the casing closed and that the fuse socket with itsferminals is diseonneced at the time by the opening of tie switches.

In Figs. 4L- ancl 5 a similar result is ohtaiiiecl by coveriiig siem oroperafgisg handle of the fuse carril-2r ami permitiug the uncovering ofthe latter only when zhe switch is open. in his construelgion lie swichblades 6am swung up by means of a sha-ft 3l having a handle on theousicle with a lateral pin 33 adapted te lie. in a notch 34 in a flange35 which projects up ward from a plate This plate is mourirecl to urnabout *the verical axis of -he hoz and has openings 87 adapted oneposition to overlie the stems 24. oi' the fuse so as to permit operarionof the laiethe outside, or in `he alternative as in Fi 4 to he out ofreciser with l such stems so as to prevent access thereto.

IIn this position the locking pin 33 o" "che handle holds the plateagainst roation long as the'haodle is (lows aufi he switch closed. Onlywhen the handle is raised to open the switch can the plate he tm-ned ioposition for accessto the fuse carriers.

Figs. 6 and 7 illustrate au apparatus using a rotary switch of the typeshown in the Murray application previously reerrefl to. The cross-bar 3Tis mouned ou a shaft 38 which carries certain switch arms, notillustrated, at its lower enel.. 37 is surrounded hy a Harige 39. liarcarries also certain fuse sockcs All?, anal in each oi ihcse is amuliple fuse carrier which We have (lcsignatecl generally by 'lheterminals el with sems passiifiL .iiuside., hof

Ehe cross-l3ar The crossmossos numeral il and which hes iis squared stemz2/i at. lhe upper emi. The cove of i'hc casing, is pivolied ai; oneside es, iliusrared arid carries ou its inner face a circular plaiepivotally mounted and proviuecl with. a pair of depending conical iladapte-cl lo iii; ino the ends of the flange 35) of 'elle messbar. Theproj/eoliens fili e again lient upward ai; their inner er D and forni aflange 4.-.5 overlying al. of the oiuli'iple las@ carrier excepttheihereof. The plate is supported by pivol afkrom the cover, acci can heurnec. ahou this pir-oi'. hy projecting handle 'en lic cover is down,vhe projecioris lili flange 39, and the turning open or closed.position. ,i vide with a pair of opeui Y give access io the seems 2li oithe fuse 85 riers when the latter, and lle cross-har 377 are irr he.posiion .in which the switch is operi. `While he switch is closcfl, rhostems 2l of ehe fuse carriers are er rcel hy ihr solid portion thecover, and no change oi fuses can be accoru'oiished.

Figs. S and illus ,e she application of he invention to what cell splunger Cievice. A block i8 carries one or v an opening iu a flange oi?a casi..v j surrounds Jche 'block 48 which thrust down imo bhe hoi 50 oro up out of ghe hoi: hy means Blacles 52 aofi insuiael from each other.3.

are carried she plunger enel adapted when he latfuer down ciose circuit'borough he @criminals ami, respe r. lrs become accessible.

moved izo Wise they are i e heee. oi. he .latter cai 'y ausl. meteo@sible, but even he use terminals themselves are inaccessible. in theprevious iig'urcs also the fuse earrier'is held agains removal.

'Vlhou the `fuses in a carrier have been `used in succession it isnecessary o call upon the companj,r io open ihe casing ariel iuiro-`duce a new 'fuse carrier.

rlhe notched` relates 28, Fig. 2, are fastened on flanges on the stems24 means of screws passing`v "ahrough ahriuiar slos 66; so.l that Jcheplates may he sesto with ``the projeci'zions 30 when fuses in circuit.

The fuses of JEhe mechanism, including those iirsx: in circuit anal heone or 'more extra fuses to be subsuilzu'ed hereor, are

CII

Leoeeoo not necessarily carried all by a single corrier7 as illustrated,and moved by :i single operating device on the outside; though thisarrangement is preferable for simplicity of construction and operation.

The purpose of having the switch with its terminals enclosed Within theeasing is to primarily prevent access to the switch terminals byunauthorized persons. it is not only to cut od the outside circuit whena new fuse is to be introduced, but to prevent access to the terminals1Within the casing' 'when the meter is disconnected by the opening ofthe switch. The switch een be opened and closed 'without operation ofthe fuse, .the means for operating the switch boing)r operativelyindependent of the fuse carrier.

Though We have described with great particulerity of detail certainembodiments of our invention, yet it is not lto be understood therefromthat the invention is restricted lto the particular embodimentsdisclosed.

Various modifications thereof in detail and in the arrangement of theparts may be made by those skilled in the art Without departure from theinvention es defined in the following claims.

What We oleini is:

l. An apparatus of the class described comprising e switch, e plug fuseshell providing e wall between the fuses end the ten minels of theswitch, a casing enclosing seid parte ondpreventing access thereto and emultiple fuse carrier in said shell and havi ing o handle accessiblefrom the outside of the casing by which a fuse cen be replaced Withoutopening the casing.

2. The epparetiis of clei-in l, the multiplefuse carrier being rotatableand having a central stem accessible from the outside of the casing forrotetinc the oirrier.4

3. The apparatus o? claim l, the fuse corrier having en operatingportion extending through an opening in the Cover of the casing and theswitch Ahaving o seperate open ating portion extending through the sideof the casing'.

'4. T he apparatus out cinirn l, the fuse cerrier having en operatingportion extending through an opening in the cover of the casing and theswitch having o seperate operating portion extending through the side ofthe casing, and seid operating portions heing interloclred with eachother Within the casing.

In Witness whereof, We have hereunto signed our nemes.

THOMAS MURRAY, J VVlLnll/l BLACKVOB.

